What should a person do if he cannot find any water or soil to purify himself with?

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Whoever cannot get water or soil may pray without purifying himself. Muslim jurists have disagreed on whether the prayer should be repeated later or not once water and/or soil becomes accessible.
1 – Hanafi and Shafa’i: Repeat the prayer when there is access to a purifying substance.
2 – Hanbali: Do not repeat the prayer.
3 – Maliki: Prayer is waived completely.